DoorDash推出可通过短信对话下单的AI代理，旨在提升用户留存并对抗Uber Eats、Grubhub等竞品。
DoorDash’s SMS-first AI ordering agent is live and driving measurable impact: 23% higher conversion vs. in-app search and a 17% lift in 7-day repeat orders. Built in just six weeks using a lightweight custom inference engine, it delivers sub-8-millisecond responses with per-interaction costs under $0.008. Crucially, it operates entirely within existing SMS infrastructure—no app install required. For early AI application founders, this demonstrates a powerful alternative to ‘frontier model’ dependency: success lies not in building general-purpose agents, but in shipping narrow, stateful, outcome-guaranteed workflows (e.g., ‘order Thai food, extra spicy’) with tight cost control and zero-friction user onboarding. Prioritizing deterministic execution over open-ended reasoning—and leveraging lean, purpose-built infrastructure—is how startups achieve rapid PMF validation and scalable unit economics.